Genesis 4:2-8New International Version - UK (NIVUK)
2 Later she gave birth to his brother Abel.
Now Abel kept flocks, and Cain worked the soil. 3 In the course of time Cain brought some of the fruits of the soil as an offering to the Lord. 4 But Abel also brought an offering – fat portions from some of the firstborn of his flock. The Lord looked with favour on Abel and his offering, 5 but on Cain and his offering he did not look with favour. So Cain was very angry, and his face was downcast.
6 Then the Lord said to Cain, ‘Why are you angry? Why is your face downcast? 7 If you do what is right, will you not be accepted? But if you do not do what is right, sin is crouching at your door; it desires to have you, but you must rule over it.’
8 Now Cain said to his brother Abel, ‘Let’s go out to the field.’[a] While they were in the field, Cain attacked his brother Abel and killed him.